Abstract
Electrochemical characteristics of carvacrol were investigated on a screen-printed electrode (SPE) modified with La2O3/Co3O4 nanocomposite by using voltammetric techniques, which displayed a well-defined peak for sensitive carvacrol determination in phosphate buffer solution (PBS) at pH 7.0. La2O3/Co3O4 nanoparticles demonstrated suitable catalytic activity for carvacrol determination by differential pulse voltammetry (DPV) technique. Besides, determination of carvacrol in a real samples was recognized in the light of electrochemical findings and a validated voltammetric technique for quantitative analysis of carvacrol in a real formulation was proposed. The DPV peak currents were found to be linear in the concentration range of 10.0 to 800.0 μM. The limit of detection (LOD) was found to be 1.0 μM.
Highlights
Carvacrol (5-isopropyl-2-methylphenol) is the main thyme oil constituent, crucial oil of Origanum vulgare, and plants including Thymus vulgaris [1]
Numerous analytical methods such as gas chromatography (GC), thin-layer chromatography (TLC) combined with densitometry, gas chromatography-mass spectrometry (GC-MS) and highperformance liquid chromatography (HPLC) with fluorimetric detection have been employed for carvacrol measurement in many matrixes [8,9,10,11]
Application of screen-printed electrodes (SPEs) for analyte analysis is in the main research focus in electrochemical sensors area, what is due to their reliability, mass production, reproducibility, and low cost [39]
Summary
Carvacrol (5-isopropyl-2-methylphenol) is the main thyme oil constituent, crucial oil of Origanum vulgare, and plants including Thymus vulgaris [1]. Application of screen-printed electrodes (SPEs) for analyte analysis is in the main research focus in electrochemical sensors area, what is due to their reliability, mass production, reproducibility, and low cost [39]. This study will focus on the design and fabrication of disposable SPE modified with La2O3/Co3O4 nanocomposite for electrochemical detection of carvacrol.
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